Bedrock Creek

The Bedrock Creek is a uranium mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Bedrock Creek

Commodity

Primary: Uranium

Location

State: Alaska
District: Circle

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Commodity): MOST RADIOACTIVE ROCK IN AREA CONTAINED 0.005% EU

Comment (Deposit): COUNTRY ROCK IS DOMINANTLY PALEOZOIC AND (OR) PRECAMBRIAN YUKON-TANANA TERRANE QUARTZ-MICA SCHIST CONTAINING NUMEROUS DISCONTINOUS QUARTZ VEINS, INTRUDED BY LOWER TERTIARY GRANITE OF THE CIRCLE PLUTON. NELSON, WEST, AND MATZKO (1954) REPORTED 10% MONAZITE, 5% TOPAZ AND A SMALL AMOUNT OF SCHEELITE IN THE HEAVY-MINERAL FRACTION OF THE GRANITE BEDROCK. OTHER MINERALS PRESENT ARE PYRRHOTITE, GARNET, ILMENITE, ZIRCON, BIOTITE, TOPAZ AND MALACHITE. TWO OTHER SAMPLES FROM THE AREA ARE SLIGHTLY ANOMALOUS IN TUNGSTEN (2-3 PPM), FLUORINE (2300-2400 PPM), LEAD (11-25 PPM), AND ARSENIC (12-24 PPM) (NELSON AND OTHERS, 1954). CONCENTRATES FROM GRAVEL ON UPPER BEDROCK CREEK CONTAIN TIN AND TUNGSTEN (BARKER, 1979). FLUOROMETRIC TESTS INDICATED THE PRESENCE OF URANIUM IN SEVERAL MINERALS BUT NOT IN AMOUNTS TO BE OF ECONOMIC INTEREST. A SLIGHTLY RADIOACTIVE ZONE OF IRON-STAINED SCHIST 0.5 TO 2 FEET WIDE BY 8 FEET LONG WAS STAKED FOR URANIUM. THIS IRON-STAINED SCHIST GAVE A RADIOMETRIC READING

Comment (Location): LOCATION OF CLAIMS IS ABOUT 100 YARDS EAST OF BEDROCK CREEK AND 50 YARDS UPSTREAM OF THE STEESE HIGHWAY BRIDGE.

Comment (Workings): CLAIMS LOCATED 100 YARDS EAST OF THE CREEK WERE ACTIVE IN 1976 - 1978. WORKINGS CONSISTED OF SURFACE TRENCHING OF A SLIGHTLY RADIOACTIVE ZONE OF IRON-STAINED SCHIST 0.5 TO 2 FEET WIDE BY 8 FEET LONG. THIS IRON-STAINED SCHIST GAVE A RADIOMETRIC READING OF ABOUT 0.05 MR/HR WHILE THE UNSTAINED SCHIST GAVE A READING OF 0.04 MR/HR (FREEMAN, 1963, P. 32).

Comment (Deposit): SITE OF LOCALIZED RADIOACTIVE ANOMALY; LOW GRADE AND SMALL SIZE; USGS OFR 83-170B, APPENDIX II, NO. 3 APPARENTLY NO POTENTIAL FOR URANIUM OF ECONOMIC IMPORTANCE.

Comment (Deposit): THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Comment (Deposit): OF ABOUT 0.05 MR/HR WHILE THE UNSTAINED SCHIST GAVE A READING OF 0.04 MR/HR (FREEMAN, 1963, P. 32). WORK ON CLAIMS BETWEEN 1976 AND 1978 CONSISTED OF SURFACE TRENCHING ON THE SLIGHTLY RADIOACTIVE ZONE OF THE IRON-STAINED SCHIST. BEDROCK CREEK IS NOTED FOR ITS ABSENCE OF GOLD, EVEN THOUGH IT IS SURROUNDED BY GOLD-PRODUCING CREEKS SUCH AS INDEPENDENCE, MAMMOTH, CROOKED AND BOULDER CREEKS (YEEND, 1991, P. 31).

Comment (Exploration): Status = Inactive

References

Reference (Other Database): BAG-OFR-83-170B-03

Reference (Deposit): Overstreet, W. C., 1967, The geologic occurrence of monazite: U.S. Geological Survey Professional Paper 530, 327 p.

Reference (Deposit): Freeman, V. L., 1963, Examination of uranium prospects, 1956: U.S. Geological Survey Bulletin 1155, p. 29-33.

Reference (Deposit): ADGGS CLAIM MAP-CIRCLE QUAD, KX-50-99

Reference (Deposit): Nelson, A. E., West, W. S., and Matzko, J. J., 1954, Reconnaissance for radioactive deposits in eastern Alaska, 1952: U.S. Geological Survey Circular 348, 21 p.

Reference (Deposit): Berg, H. C. and Cobb, E. H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Nokleberg, W. J., Bundtzen, T. K., Berg, H. C., Brew, D. A., Grybeck, D., Robinson, M. S., Smith, T. E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.

Reference (Deposit): Yeend, W. E., 1991, Gold placers of the Circle district, Alaska - past, present, and future: U.S. Geological Survey Bulletin 1943, 42 p.

Reference (Deposit): Barker, J. C., 1979, Trace element study of the Circle mining district, Alaska: U.S. Bureau of Mines Open File Report 57-79, 74 p.

Reference (Deposit): Menzie, W. D., Foster, H. L., Tripp, R.B., and Yeend, W. E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.

Reference (Deposit): Eberlein, G. D., Chapman, R. M., Foster, H. L., and Gassaway, J. S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open File Report 77-168D, 132 p.

Reference (Deposit): Cobb, E. H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Circle quadrangle, Alaska: U. S. Geological Survey Open-File Report 76-633, 72 p.

Reference (Deposit): Cobb, E. H., 1972, Metallic mineral resources map of the Circle quadrangle, Alaska: U.S. Geological Survey Misc. Field Studies Map 391, 1 sheet, scale 1:250,000.

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